config.gcc: Simplify arm --with-{cpu,tune} test.

	* config.gcc: Simplify arm --with-{cpu,tune} test.
	* config/arm/arm-cores.def: Document whitespace restrictions.

From-SVN: r81365

gcc/ChangeLog

+2004-04-30  Paul Brook  <paul@codesourcery.com>
+
+	* config.gcc: Simplify arm --with-{cpu,tune} test.
+	* config/arm/arm-cores.def: Document whitespace restrictions.
+
 2004-04-30  Rainer Orth  <ro@TechFak.Uni-Bielefeld.DE>
 
 	PR other/1963

gcc/config.gcc

@@ -2223,17 +2223,15 @@ fi
 		for which in cpu tune; do
 			# See if it matches any of the entries in arm-cores.def
 			eval "val=\$with_$which"
-			[ x"$val" = x ] && val=unset
-			for opt in `sed -e '/ARM_CORE/!d' \
-			  -e 's/ARM_CORE(\([^,]*\),.*$/\1/' \
-			  ${srcdir}/config/arm/arm-cores.def` unset .
-			do
-				[ x$opt = x"$val" ] && break
-			done
-			if [ $opt = . ]; then
-				echo "Unknown CPU used in --with-$which=$val" 1>&2
-				exit 1
-			  
+			if [ x"$val" = x ] \
+			    || grep "^ARM_CORE($val," \
+				    ${srcdir}/config/arm/arm-cores.def \
+				    > /dev/null; then
+			  # Ok
+			  true
+			else
+			  echo "Unknown CPU used in --with-$which=$val" 1>&2
+			  exit 1
 			fi
 		done
 

gcc/config/arm/arm-cores.def

@@ -31,7 +31,9 @@
    COSTS is the name of the rtx_costs routine to use.
 
    If you update this table, you must update the "tune" attribute in
-   arm.md.  */
+   arm.md.
+   
+   Some tools assume no writespace up to the first "," in each entry.  */
 
 ARM_CORE(arm2,		2,	FL_CO_PROC | FL_MODE26, slowmul)
 ARM_CORE(arm250,	2,	FL_CO_PROC | FL_MODE26, slowmul)